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Optical and Physical Layer Statistics

 

Performance monitoring is conducted on a number of optical and physical layer attributes on UFMs and optical modules.

Table 1: Optical Statistics

Counter

Description

Units

cc-opr

Coherent channel power received.

dBm

cc-opr-avg

Coherent channel power received (average).

dBm

cc-opr-max

Coherent channel power received (maximum).

dBm

cc-opr-min

Coherent channel power received (minimum).

dBm

cd

Chromatic dispersion.

The chromatic dispersion of the received signal.

ps/nm

cd-avg

Chromatic dispersion (average).

ps/nm

cd-max

Chromatic dispersion (maximum).

ps/nm

cd-min

Chromatic dispersion (minimum).

ps/nm

cfo

Carrier frequency offset.

The carrier frequency offset of the received signal.

MHz

cfo-avg

Carrier frequency offset (average).

MHz

cfo-max

Carrier frequency offset (maximum).

MHz

cfo-min

Carrier frequency offset (minimum).

MHz

dgd

Differential group delay.

The differential group delay of the received signal.

ps

dgd-avg

Differential group delay (average).

ps

dgd-max

Differential group delay (maximum).

ps

dgd-min

Differential group delay (minimum).

ps

lbc

Laser bias current.

mA

lbc-avg

Laser bias current (average).

mA

lbc-max

Laser bias current (maximum).

mA

lbc-min

Laser bias current (minimum).

mA

ltemp

Laser temperature.

°C

ltemp-avg

Laser temperature (average).

°C

ltemp-max

Laser temperature (maximum).

°C

ltemp-min

Laser temperature (minimum).

°C

opt-back-ref-ratio

Optical back-reflection ratio

The ratio of optical back reflection.

dB

opt-back-ref-ratio-min

Optical back-reflection ratio (minimum)

dB

opt-back-ref-ratio-max

Optical back-reflection ratio (maximum)

dB

opt-back-ref-ratio-avg

Optical back-reflection ratio (average)

dB

opt-back-ref-ratio-std-avg

Optical back-reflection ratio (standard deviation from average)

dB

opl-rx

Optical power loss receive.

The optical power loss in the receive direction.

dB

opl-rx-avg

Optical power loss receive (average).

dB

opl-rx-max

Optical power loss receive (maximum).

dB

opl-rx-min

Optical power loss receive (minimum).

dB

opr

Optical power received.

dBm

opr-avg

Optical power received (average).

dBm

opr-max

Optical power received (maximum).

dBm

opr-min

Optical power received (minimum).

dBm

opr-std-avg

Optical power received (standard deviation).

An approximation of the variance of the power samples of the received optical signal.

dBm

opt

Optical power transmitted.

dBm

opt-avg

Optical power transmitted (average).

dBm

opt-max

Optical power transmitted (maximum).

dBm

opt-min

Optical power transmitted (minimum).

dBm

opt-std-avg

Optical power transmitted (standard deviation).

An approximation of the variance of the power samples of the transmitted optical signal.

dBm

opt-total

Total (signal and noise) optical power transmitted.

dBm

opt-total-avg

Total (signal and noise) optical power transmitted (average).

dBm

opt-total-max

Total (signal and noise) optical power transmitted (maximum).

dBm

opt-total-min

Total (signal and noise) optical power transmitted (minimum).

dBm

osnr

Optical signal to noise ratio.

The signal to noise ratio of the received optical signal.

dB

osnr-avg

Optical signal to noise ratio (average).

dB

osnr-max

Optical signal to noise ratio (maximum).

dB

osnr-min

Optical signal to noise ratio (minimum).

dB

snr

Signal to noise ratio.

The signal to noise ratio of the received signal.

dB

snr-avg

Signal to noise ratio (average).

dB

snr-max

Signal to noise ratio (maximum).

dB

snr-min

Signal to noise ratio (minimum).

dB

snr-x

X-polarization signal to noise ratio.

The X-polarization signal to noise ratio of the received optical signal.

dB

snr-x-avg

X-polarization signal to noise ratio (average).

dB

snr-x-max

X-polarization signal to noise ratio (maximum).

dB

snr-x-min

X-polarization signal to noise ratio (minimum).

dB

snr-y

Y-polarization signal to noise ratio.

The Y-polarization signal to noise ratio of the received optical signal.

dB

snr-y-avg

Y-polarization signal to noise ratio (average).

dB

snr-y-max

Y-polarization signal to noise ratio (maximum).

dB

snr-y-min

Y-polarization signal to noise ratio (minimum).

dB

span-lngth

The span length.

km